Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze
	Wang, Junfeng; Li, Jingyi; Ye, Jianhuai; Zhao, Jian; Wu, Yangzhou; Hu, Jianlin; Liu, Dantong; Nie, Dongyang; Shen, Fuzhen; Huang, Xiangpeng
刊名	NATURE COMMUNICATIONS
	2020-06-05
卷号	11 期号:1 页码:1-9
ISSN号	2041-1723
英文摘要	Severe events of wintertime particulate air pollution in Beijing (winter haze) are associated with high relative humidity (RH) and fast production of particulate sulfate from the oxidation of sulfur dioxide (SO2) emitted by coal combustion. There has been considerable debate regarding the mechanism for SO2 oxidation. Here we show evidence from field observations of a haze event that rapid oxidation of SO2 by nitrogen dioxide (NO2) and nitrous acid (HONO) takes place, the latter producing nitrous oxide (N2O). Sulfate shifts to larger particle sizes during the event, indicative of fog/cloud processing. Fog and cloud readily form under winter haze conditions, leading to high liquid water contents with high pH (>5.5) from elevated ammonia. Such conditions enable fast aqueous-phase oxidation of SO2 by NO2, producing HONO which can in turn oxidize SO2 to yield N2O.This mechanism could provide an explanation for sulfate formation under some winter haze conditions. How sulfur dioxide emitted through coal combustion is oxidized to sulfate particles during winter haze pollution events has been the subject of debate. Here, the authors show that rapid oxidation takes place by nitrogen dioxide and nitrous acid, producing nitrous oxide together with sulfate.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44316]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Junfeng,Li, Jingyi,Ye, Jianhuai,et al. Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze[J]. NATURE COMMUNICATIONS,2020,11(1):1-9.
APA	Wang, Junfeng.,Li, Jingyi.,Ye, Jianhuai.,Zhao, Jian.,Wu, Yangzhou.,...&Jacob, Daniel J..(2020).Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze.NATURE COMMUNICATIONS,11(1),1-9.
MLA	Wang, Junfeng,et al."Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze".NATURE COMMUNICATIONS 11.1(2020):1-9.